HP 3PAR Recovery Manager Software for Microsoft SQL Server Licenses - Manual (Page 89)

11 Remote Copy for Recovery Manager
Overview
HP 3PAR Remote Copy Software helps you to safeguard against disasters that might occur at one
location, by allowing you to keep copies of data on a separate server which can be placed at a
remote location. For example, if there were a fire or earthquake at one location, all of the data
stored there could be lost unless a backup copy can be recovered from a separate location not
affected by the disaster.
To maintain updated copies of data at a remote location, Remote Copy uses two HP 3PAR StoreServ
Storage Systems: a primary server (used for production) and a backup server, which can be located
anywhere. Therefore, when disaster strikes in one location, there is always a backup of your data
at the backup site.
For more information, see the HP 3PAR Remote Copy Software User’s Guide.
How Remote Copy Works
When you synchronize data between a production system (the Remote Copy primary system) on
one site and the backup server at another site, the systems involved perform the following steps in
sequence:
•
Recovery Manager leverages the VSS framework to freeze the I/O at the application level.
•
For asynchronous periodic mode Remote Copy, the VSS provider creates a virtual copy of
the database and log volumes.
•
Remote Copy synchronizes the data on the primary server with the data on the Remote Copy
backup server (thus updating the backup server).
•
After synchronization is complete, Remote Copy creates a virtual copy ( snapshot) on the
Remote Copy backup server.
•
The Remote Copy backup server saves the virtual copy in its repository at the remote site.
•
For asynchronous periodic mode Remote Copy, Recovery Manager removes the virtual copy
entry from its primary backup server repository and virtual copies created at the primary
StoreServ will be retained.
NOTE: User can make use of the Expiration policy settings of Recover Manager. In this case,
the retained virtual copies are removed by the StoreServ after the expiration period has
elapsed.
NOTE: For the Recovery Manager GUI to manage virtual copies on the Remote Copy backup
server, you must configure Recovery Manager with the precise server and instance names for the
supported SQL servers. For more information, see
“Configuring Recovery Manager” (page 20) .
NOTE: Remote copy is not supported for SQL Server 2012 Availability databases.
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